.chen{
	justify-content: flex-start;
}
.chen ul{
	display: none;
}
.chen span{
	position: static;
	margin-left: 15px;
}
nav ul{
	justify-content: flex-start;
	margin-right: 60px;
}
nav ul li{
	display: none;
}
nav ul li:nth-child(2){
	display: block;
}
nav ul li:nth-child(3){
	display: block;
}
nav ul li:nth-child(4){
	display: block;
}
.lister{
	display: none;
}
.tool .det{
	display: block;
	background-color: #ebebeb;
	display: flex;
	justify-content: flex-start;
}
.tool .det img{
	height: 100%;
	padding-left: 5px;
}
.pg2{
	width: 100%;
}
.pg2 .ext span{
	width: 100%;
}
footer ul{
	display: none;
}
footer p{
	background-color: #007D6B;
	color: #fff;
}